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   <h4 class="subsectionHead"><span class="titlemark">2.3   </span> <a 
 id="x8-120002.3"></a>LatticeElements</h4>
<!--l. 348--><p class="noindent" >
   <h5 class="subsubsectionHead"><span class="titlemark">2.3.1   </span> <a 
 id="x8-130002.3.1"></a>Lattice2d</h5>
<!--l. 349--><p class="noindent" >Represents two-node lattice element. Each node has 3 degrees of freedom. The element is defined in x,y plane. The
element features are summarized in Table&#x00A0;<a 
href="#x8-130026">6<!--tex4ht:ref: lattice2dsummary --></a>.
<!--l. 352--><p class="indent" >   <hr class="figure"><div class="figure" 
>
                                                                                           
                                                                                           
<a 
 id="x8-130014"></a>
                                                                                           
                                                                                           
<!--l. 5--><p class="noindent" ><img 
src="elementlibmanual-figure3.png" alt="PIC"  
>
<br /> <div class="caption" 
><span class="id">Figure&#x00A0;4: </span><span  
class="content">Lattice2d element. Node numbering, DOF numbering and definition of integration point <span 
class="cmmi-10">C</span>.</span></div><!--tex4ht:label?: x8-130014 -->
                                                                                           
                                                                                           
<!--l. 359--><p class="indent" >   </div><hr class="endfigure">
<div class="center" 
>
<!--l. 361--><p class="noindent" >
<div class="table">
<!--l. 361--><p class="noindent" ><a 
 id="x8-130026"></a><hr class="float"><div class="float" 
> <!--tex4ht:inline--><div class="tabular"> <table id="TBL-7" class="tabular" 
cellspacing="0" cellpadding="0" rules="groups" 
><colgroup id="TBL-7-1g"><col 
id="TBL-7-1"></colgroup><colgroup id="TBL-7-2g"><col 
id="TBL-7-2"></colgroup><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-7-1-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-1-1"  
class="td11"><span 
class="cmbx-10">Keyword         </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-7-1-2"  
class="td11"><!--l. 361--><p class="noindent" ><span 
class="cmbx-10">lattice2d</span>                                                       </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-2-1"  
class="td11">Description          </td><td  style="white-space:wrap; text-align:left;" id="TBL-7-2-2"  
class="td11"><!--l. 361--><p class="noindent" >Lattice element                                                         </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-3-1"  
class="td11">Specific parameters</td><td  style="white-space:wrap; text-align:left;" id="TBL-7-3-2"  
class="td11"><!--l. 361--><p class="noindent" ><span 
class="cmtt-10">thick</span>&#x00A0;#<span 
class="cmr-5">(rn) </span><span 
class="cmtt-10">width</span>&#x00A0;#<span 
class="cmr-5">(rn) </span><span 
class="cmtt-10">gpCoords</span>&#x00A0;#<span 
class="cmr-5">(ra)</span>                                 </td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-7-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-4-1"  
class="td11">Parameters           </td><td  style="white-space:wrap; text-align:left;" id="TBL-7-4-2"  
class="td11"><!--l. 362--><p class="noindent" ><span 
class="cmtt-10">thick</span>: defines the out of plane (<span 
class="cmmi-10">z</span>-direction) thickness      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-5-1"  
class="td11">                </td><td  style="white-space:wrap; text-align:left;" id="TBL-7-5-2"  
class="td11"><!--l. 363--><p class="noindent" ><span 
class="cmtt-10">width</span>: defines the width of the midpoint cross-section in
the <span 
class="cmmi-10">x</span>-<span 
class="cmmi-10">y </span>plane with the point <span 
class="cmmi-10">C </span>at its centre                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-6-1"  
class="td11">                </td><td  style="white-space:wrap; text-align:left;" id="TBL-7-6-2"  
class="td11"><!--l. 364--><p class="noindent" ><span 
class="cmtt-10">gpCooords</span>: array of the coordinates of the integration point
<span 
class="cmmi-10">C </span>in the global coordinate system                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-7-1"  
class="td11">Unknowns            </td><td  style="white-space:wrap; text-align:left;" id="TBL-7-7-2"  
class="td11"><!--l. 365--><p class="noindent" >Three  dofs  (<span 
class="cmmi-10">u</span>-displacement,  <span 
class="cmmi-10">v</span>-displacement,  <span 
class="cmmi-10">w</span>-rotation)
are required in each node.                                           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-8-1"  
class="td11">                </td></tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-7-9-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-9-1"  
class="td11"></td></tr></table>
</div>
<br /> <div class="caption" 
><span class="id">Table&#x00A0;6: </span><span  
class="content">lattice2d element summary</span></div><!--tex4ht:label?: x8-130026 -->
</div><hr class="endfloat" />
</div>
</div>
                                                                                           
                                                                                           
                                                                                           
                                                                                           
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